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60ded7cc86
This patch simplifying the handling of modeset locks and atomic state for an atomic commit is based on https://lore.kernel.org/all/20210715184954.7794-2-ville.syrjala@linux.intel.com/ adding the helper to i915. I find this approach preferrable than open-coding the corresponding steps (fixed for me an atomic state reset during a DEADLK retry, which I missed in the open-coded version) and also better than the existing DRM_MODESET_LOCK_ALL_BEGIN/END macros for the reasons described in the above original patchset. This change takes the helper into use only for atomic commits during DDI hotplug handling, as a preparation for a follow-up patch adding a similar commit started from the same spot. Other places doing a driver-internal atomic commit is to be converted by a follow-up patchset. Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Imre Deak <imre.deak@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20230510103131.1618266-13-imre.deak@intel.com
33 lines
989 B
C
33 lines
989 B
C
/* SPDX-License-Identifier: MIT */
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/*
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* Copyright © 2023 Intel Corporation
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*/
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#ifndef __INTEL_MODESET_LOCK_H__
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#define __INTEL_MODESET_LOCK_H__
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#include <linux/types.h>
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struct drm_modeset_acquire_ctx;
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struct intel_atomic_state;
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void _intel_modeset_lock_begin(struct drm_modeset_acquire_ctx *ctx,
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struct intel_atomic_state *state,
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unsigned int flags,
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int *ret);
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bool _intel_modeset_lock_loop(int *ret);
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void _intel_modeset_lock_end(struct drm_modeset_acquire_ctx *ctx,
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struct intel_atomic_state *state,
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int *ret);
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/*
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* Note that one must always use "continue" rather than
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* "break" or "return" to handle errors within the
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* intel_modeset_lock_ctx_retry() block.
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*/
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#define intel_modeset_lock_ctx_retry(ctx, state, flags, ret) \
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for (_intel_modeset_lock_begin((ctx), (state), (flags), &(ret)); \
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_intel_modeset_lock_loop(&(ret)); \
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_intel_modeset_lock_end((ctx), (state), &(ret)))
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#endif /* __INTEL_MODESET_LOCK_H__ */
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